As you can see, most if not all are lightweight tools, and the result is that Lubuntu requires very low system resources - the Lubuntu wiki mentions that Lubuntu should run even with 128 MB of RAM, though for decent usage, 256MB or RAM or more are required.

In Lubuntu 12.10, a new default application has been added: Catfish, which can be used to search the file system:

Another change is the addition of the Xfce notification daemon (xfce4-notifyd), which has replaced the old notification daemon:

Pcmanfm, the default file manager, has been updated, the new version bringing external thumbnailer support and lots of bug fixes: